Side arm equipped glassware



July 2, 1940. w. T. LEvlTT I SIDE ARMVEQUIPED GLASSWARE Filed Sept. 13,1937 2 Sheets-Sheet 1 INVENTOR Zia/IL .Lenzi BY 66@ ATTORNEYS.

July 2, 1940. w. T. LEvl'r'r 2,296,815

SIDE ARM QUIPPED GLASSWARE Filed'Sept. l5, 1937 2 Sheets-Sheet 2INVENTOR.

ATTORNEYS.

Patented July 2, 1940 UNITED STATES PATENT OFFICE SIDE ARM EQUIPPEDGLASSWARE Application September 13, 1937, Serial No. 163,524

5 Claims.

This invention relates to glasswarevfor labora- 'tory and industrialwork, and more particularly to side arm equipped ground glass joints,stop cocks, and the like.

The problem in the art has been to accurately attach the side arm orarms on the female -cone of a ground glass joint or the shell of a stopcock, so that the bore of the side arm will be perfectly aligned withthe opening in the male cone of the ground glass joint or the bore inthe plug of the stop cock.

Heretofore the glass blower has had-to rely entirely on his own skilland judgment in selecting the proper point on the femaley cone or shellat which to fuse the side arm. This has frequently resulted inimperfectly locating the Vside arm with consequent failure of theopening or bore in themale cone or plug Ato exactly register with thebore of the side arm.

Heretofore, moreover, the male and female cones of the ground glassjoint o r the shell and plug of a stop cock have usually been individualgrindings. Consequently, when one of the parts became broken it wasnecessary to remove the I 4complemental part from the apparatus line andreturn it to the manufacturer in order that 4a new part mightbe groundto t the returned part.

With the adoption of a recognized commercial standard (see Bulletin ofthe U. S. Dept. of Comn merce, No. CS 21-36 of May 1-5, 1936) forstandard tapered interchangeable ground glass joints, stop cocks andStoppers, it has become increasingly important that the female cone of aground glassjoint or the shell of a stop cock be provided with somemeans for accurately locating the point of attachment of the side armthereto so that replacement parts may be ordered by catalog number4 fromthe manufacturer with every assurance that the replacement part willlproperly fit the complemental part of the joint or stop cock.

Another advantage is that the manufacturer may grind at onetime andcarry in stock a definite quantity of female cones or shells of varioussize, taper and side arm arrangement, together withan adequate supply ofmale cones or plugs of the complemental size, taper and opening or borearrangement, thus effecting a worth-while saving in manufacturing costs.

According to my invention I provide the female cone of a ground glassjoint or the shell of a stop cock, preferably during manufacturethereof,with predetermined markings by' means of which the glass blower maylocate the side arm or arms thereon so that when such side arm or 4armsare fused in place the bore thereof will exactly align with the hole orbore in the complemental male cone" or plug.

Such locating marks are permanentand may take any desired form. Forexample, they may be a spaced series of circumferential rings formedintegrally with the female cone or shell at predetermined intervalsbetween the ends thereof.

Where formed as rings, such rings may be either protuberances orindentation's, and mayl completely or only partially encircle the coneorshell.

Or, if desired, the locating marks of whatever form or nature may besandblasted or otherwise permanently etched in the female cone or shellwithout the necessity of deforming in any way the cone or shell itself.

I prefer, however, to form the locating marks as annular protuberancesbecause such rings not only strengthen and make more rugged vthe femalecone or shell, but impart to it a distinctive design 0r appearance whichimmediately identifies the Ware as ware of my manufacture.

Regardless, however, of the physical form which thesepermanent markingsmay take, once applied to the female cone or `shell they becomepredetermined locating points for the attachment of the side arm orarms, which in accordance with conventional practice are fused in placeby rst heating the female-cone or shell to pull a hole or holes in thewall thereof at the exact point or points where the side arm or arms areto be attached and thereafterfusing the side arm or arms into such holeor holes.

Thus the glass blower is relieved of the necessity of depending upon thejudgment of his eye alone as to the point on the female cone or shell atwhich to locate the side arm. Instead, by pulling the hole at or betweena definite marking or markings and there attaching the side arm, he canbe assured that the hole in the male cone or plug when ground willaccurately'register with the bore of the side arm.

In the drawings:

Figs. 1 to 5 inclusive show several of the many possible side armarrangements for conventional stop cocks, the shells of the stop cocks.being provided with predetermined locating marks in accordance with myinvention.

Fig. 6 shows a standard taper interchangeable ground joint, the femalecones of which are prol vided with locating marks in accordancewith myinvention for the attachment of the side arms.

Figs. 7, 8 and 9 are elevationsof female cones or shells showing severalof the many possible methods of applying the locating marks thereto.

Fig. 10 is a sectional detail particularly illus-l flasks and tubessufficiently suggest the manypossible uses.

In Figs.y 1 to 5, inclusive, I have shown conventional stop cocksA withseveral differentside arm arrangements. In all of these views the shell.and plug of a conventional stop cock are designated I0 and Il,respectively, the shell being provi/ded at its lower endwith the usualshoulder d recess I2 for the reception of the usual ru er or otherwasher I3 commonly employed to prevent the plug from falling by gravityout of' he shell when the stop cock is inverted.

In Fig. 6 I have shown a U-tube 29 having standard taper ground jointscomprising female cones 30 and male cones 33.

Referring to Figs. 1 to 5, inclusive, the shell Il) between its ends isprovided with a vertically spaced series of circumferential rings I4.These rings constitute permanent locating marks for the attachment ofthe side-arm or arms as well ,as contributing to the ruggedness of theshell. These rings may beequidistantly spaced or not,

as desired.

In Fig. 1 the stop cock has two oppositely disposed tubular side armsIICand I1. These are y:fused to. opposite sides of the shell within the"zone of the locating rings I4. As shown, the side arms are co-planarand fused to opposite sides [of the shell at one of the rings It.

In attaching the side arms such ring indicates to the glass blower theexact points between the shell vends at which the holes Illia and I'Iaare to be pulled in the shell wall so thatv the side arms, as-diagrammatically indicated by `the broken line 42, in Fig. 10.

In Fig. 2 the stop cock is provided at one side thereof with a singleside arm I6 and at the oppositefside thereof with a superposed pair of 1side arms 20 and 2|, the pulled holes for:` said arms being designatedat Ita, 20a and 2m, respectively. The plug H of the stop cock isprovided with two diagonal bores I8 and I9. When the plug is in theposition of Fig. 2, the bore I8 places the arms I6 and 20 incommunication with each other. When the plug is rotated 180 in the shellthe bore I9 places the arms I6 and 2l in communication with each other.

In Fig. 3 the side arms 22 and 24 are disposed at opposite sides of thestop cock but at differy ent levels the pulled holes for said arms beingdesignated at 23 and 25, respectively. The plug II has a diagonal bore2t which places said' aaoasm cones so of the u tube 2s .within the 'zoneof the locating rings 3l. The ground glass male cone 33 is hollow, asindicated at 34 and isprovided with a lateral ho1e35 which registersexactly with the bore of a side arm 32 when inserted in a female cone30.

In the modification of Fig. '7, the locating marks are applied to thehollow member I0, which may be considered either as the shell of thestop cock orthe female cone 30 of the ground glass joint, ascircumferential indentations 31.

In Fig. 8 the locating marks are circumferential, but are disposed aslaterally spaced prontuberances 38.

In Fig. 9they are sandblasted, etched or other-` wise applied to themember I0 as surface dots or spots 39.

In Fig. 1l the spots or dots .40 are indented and in Fig. 12 they extendas'protuberances Il.

In all forms, the locating marks, however applied, establish between theends of the member I0 -a definitely delimited zone for the attachment ofthe side arm as Well as accurate guides or markers for the preciselocation of the side arms within such zones.

In the appended claims the term female cone is used in its inclusivesense to designate either the female cone 30 of a ground glass joint orthe shell I0 of a stop cock, and term male cone is likewise used in itsinclusive sense to designate either the male cone 33 of the ground glassjoint or the plug of the stop cock.

What I therefore claim and desire to secure by Letters Patent is:

1. In the manufacture of side arm equippedl vitreousware, the method of'attaching the si'de arm to the female member of such articles as stopcocks or the like at the precise point at which thebore of said side armwill substantially exactly coincide with the bore or opening in thecomplemental male member, comprising forming the female member andsimultaneously forming therein a seriesof integral formations on itsside wall at spaced distances from the ends thereof, heating the femalemember and pulling an opening therein adjacent the selected formation,and fusing a side arm to the female member about said pulled opening.

2. As a new article of manufacture, a molded hollow female member of avstopcock', joint or like article off vitreous ware adapted to beequipped with a tubular side arm, said member having -a series of spacedlocating formations formed integrally -with the side wall thereof andpositioned to mark the point on the side wall at which a side arm whenfused to said member will have its bore substantially coinciding withthe bore or opening in the complemental male member of the stopcock.A

3; The article of claim 2, in which the'locating formations extend ascircumferential pro- -tuberances about thefemale member.

4. The article of claim 2, in which the locating formations extend ascircumferential indentations about the female member.

5. The article of claim 2, in which the locating formations extend incircumferential rows about lthe female member and all formations in each.circumferential row are spaced laterally from each other.

. WILLIAM T. LEVI'I'I.

